whistle-blower

noun

1. informal,  a person who informs on someone or puts a stop to something

Example Sentences

But industry whistle-blowers have told the BBC that they believe virgin palm oil and other non-waste materials are often being used instead.

From BBC

"It's common knowledge that really what we're doing is a scam. Most of it is to fool the Ogoni people," the whistle-blower said.

From BBC

Nearby sat the family of John Barnett, the former Boeing engineer and whistle-blower who died by suicide earlier this year in the midst of a Justice Department criminal investigation into the company.

From New York Times

Then, the OpenAI whistle-blower Daniel Kokotajlo speaks in one of his first public interviews about why he risked almost $2 million in equity to warn of what he calls the reckless culture inside that company.

From New York Times

The group published an open letter on Tuesday calling for leading A.I. companies, including OpenAI, to establish greater transparency and more protections for whistle-blowers.

From New York Times

Related Words

• informant 
• informer